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Bilge Keel Repair on FPSO

Technical Situation

Former tanker length 274 meter, 132,361Tons Gross Tonnage
During the conversation from a tanker toan FPSO, the bilge keel was modified.
Design flaws together with poor workmanship caused the bilge keel to fracture during operation in several locations.
Subsea Global Solutions worked together with the owner and Class to perform permanent underwater wet weld repair on the fractures, without interrupting the production.
Weld repairs still perform after more four years in service exposed to high hydrodynamic forces.

Uwe Aschemeier

Uwe Aschemeier is a German born and educated Welding Engineer who has evolved through the metals industry by studying mechanical engineering and welding engineering at various advanced education institutions in Germany. Mr. Aschemeier worked for the German Welding Society at its Institute in Munich for several years prior to moving to the United States of America. He has continued his expertise development by working for the Chicago Manufacturing Center, a non-profit consulting organization as well as Charcas Engineering/Domson Engineering in Toronto, Canada. In 2000, he joined H.C. Nutting Company in Cincinnati, where he worked as a senior welding engineer, commercial diver, and consultant. After consulting for Miami Diver for several years in welding related topics, he join Miami Diver LLC. (now Subsea Global Solutions) as their senior welding engineer and commercial diver in 2007. Over the next 10 years Mr. Aschemeier led the development of wet welding procedures to the level of A class through a JIP (joint industrial project) with DNV/GL and the GL testing lab in Hamburg to achieve for the first time A class groove weld procedures. This was done by showing on a consistent basis wet welding that meets A class standards, enabling true structure repairs that can be done on vessels with wet welding procedures. Mr. Aschemeier serves on the ISO/TC 44/SC 15 - Underwater welding committee representing the USA in this EU wet welding standard. He is the vice chair on D3.6M underwater welding standard, and also sits on 3 welding committees for AWS Standards and task groups as chair or vice chair. He has authored and co-authored numerous welding and NDE related articles published in the “Welding Journal”, “Inspection Trends” and other national and international trade magazines. He also serves in the “Fachausschuss Unterwassertechnik” (Technical committee underwater technology) from the German Welding Society (DVS). For six years, he served on the AWS Board of Directors.